Cobra Radspeed Irons

We test out the Radspeed, Cobra's new game-improvement iron for 2021

Cobra Radspeed Irons Review
Golf Monthly Verdict

Pound for pound, the Radspeed will undoubtedly become one of the best distance irons on the market, aimed at the mid-to-high handicapper that demands an iron that’s long and easy to hit thanks to effortless launch and hot faces.

Reasons to buy
  • +

    Faster and longer than last year's iron but still with playable ball flights. Improvements in feel too.

Reasons to avoid
  • -

    Extra distance may create gapping issues.

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In this Cobra Radspeed irons review article and video, Joel Tadman tests the brand's new game improvement iron to discover what performance golfers can expect

Cobra Radspeed Irons Review

There’s an awful lot to admire in the upgrade to the King Speedzone iron. Eyebrows were raised when Cobra strengthened the lofts last time around but they have stayed the same into the new Radspeed iron.


Down at address, you’ll notice the generous offset and darker carbon fibre section within the topline, which is a big improvement on the lighter checked pattern that featured in last year’s King Speedzone and does make it look fractionally thinner. We also prefer the less reflective finish on the metal itself.

Cobra Rad Speed Irons Review

The sole shape on these distance irons has changed too - it plays narrower and has a little less camber to it, which makes it look a little less cumbersome and means you now can't see the back of the sole behind the topline at address.


The toe screw is a bit of an eyesore but that aside, it’s a modern-looking iron with lots to like aesthetically.

Our testing of the 7-iron on the Foresight Sports GCQuad launch monitor showed improvements across the board with the Radspeed versus the King Speedzone iron.

The Cobra Radspeed iron was nearly 2mph faster in ball speed and launched the ball fractionally higher. It also produced less spin but not only was the peak height slightly higher but the descent angle was slightly steeper, which means the low spin isn’t of concern because you should still get the same level of stopping power into greens.

Whether you want the extra five yards in carry is debatable, but you can’t argue with the extra performance Cobra has managed to unlock here without touching the lofts.


The feel and sound has improved too and we don’t say this lightly, because the King Speedzone was one of the hottest, best-feeling irons in the category. But the Radspeed certainly has a quieter sound to it, no doubt in part down to the 3D printed medallion, which contributes to a softer feel, while still offering plenty of zing off the face at impact.

The option of the One Length set configuration as well as the Cobra Connect as standard provide greater scope for improvement through more consistent swings and performance analysis respectively, should they be routes you wish to go down. We'd certainly recommend exploring them if you haven't already.

Joel Tadman
Technical Editor

Joel has worked in the golf industry for over 12 years covering both instruction and more recently equipment. He now oversees all product content here at Golf Monthly, managing a team of talented and passionate writers and presenters in delivering the most thorough and accurate reviews, buying advice, comparisons and deals to help the reader find exactly what they are looking for. So whether it's the latest driver, irons, putter or laser rangefinder, Joel has his finger on the pulse keeping up to date with the latest releases in golf. He is also responsible for all content on irons and golf tech, including distance measuring devices and launch monitors.

One of his career highlights came when covering the 2012 Masters he got to play the sacred Augusta National course on the Monday after the tournament concluded, shooting a respectable 86 with just one par and four birdies. To date, his best ever round of golf is a 5-under 67 back in 2011. He currently plays his golf at Burghley Park Golf Club in Stamford, Lincs, with a handicap index of 3.2.

Joel's current What's In The Bag? 

Driver: Titleist TSR3, 9° 

Fairway wood: Titleist TSR3, 15° 

Hybrid: Titleist TSi2, 18° 

Irons: Ping i230 4-UW

Wedges: Titleist Vokey SM8, 54°. Titleist Vokey SM9 60° lob wedge, K Grind

Putter: Evnroll ER2V 

Ball: 2023 Titleist Pro V1x